Stanford Research Systems RGA100, Operating Manual And Programming Reference

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5-12 Features and Operation
SRS Residual Gas Analyzer
Scan logging continuously saves scan data along with the time and date, with only the
essential information about each scan. The user can easily browse through the scans
after the scan logging is complete using the Next Item and Previous Item commands from
the View menu or the arrow buttons in the Tool Bar.
Scan logging is implemented for all the display modes. Even the split mode and the
spectrum analysis function can be logged. Any encountered errors will be logged for
troubleshooting. Each mode has its own file folder to save the logged data by default in
the log main folder (..\SRS\RGA3_0\Log). The analog scan (.ana), the histogram (.hst),
and the table scan (.tbl) are saved in both RGA spectrum format and ASCII text format
(.txt). Other scans are saved only in ASCII text format. The ASCII format file can be
opened with any word processor program and also can be opened with a spreadsheet
program.
Graph Management
RGA is a fully interactive Windows program that allows the user to directly manipulate
graphical objects on the screen by double-clicking on them with a point and click device
such as a mouse or track ball. The ViewControl Bar contains shortcut buttons for
controlling the active graphic display: rescaling, zooming out, zooming in, pan left, pan
right, full scale. These functions can be performed during scanning
.
Almost every graph object in every display mode may be edited by double clicking on it.
The extent of the editing depends on the actual object. For example you may change
the text color, font, and size of any graph title but you may only change the color of the
bar graphs in Histogram mode. Every graph object that can be edited by double-
clicking on it may also be edited by using an equivalent command from the Graph menu.
All graph parameters relating to graph objects are saved when the Save or Save As
commands are used form the File menu.
Graph object parameters are local variables to the presently active display mode only.
For example, if the background mode in Analog mode is changed to yellow, the
background mode of all the other modes remains unchanged. Also, any new file using
the Analog mode still uses the default background color.
After an RGA file has been edited to have a desired look, it may be used as a template
for new files by clearing its data using the Clear Graph Data command in Edit menu,
saving it using the Save As command, and opening it again using the Open command.
Head Management
The SRS RGA Head has nonvolatile memory that stores most head variables such as
sensitivity factors, Channel Electron Multiplier gain, high voltage, calibration factors,
etc. When the RGA program connects to a head, all these variables are read from the
head and stored temporarily in the program for use in the active file. When a head
parameter is edited using the command in the Head menu, that parameter is stored back
in the head immediately.